Dr. Patrick Chang MD

Recommended Articles

• Chronic Knee Pain: What Are the Causes, Symptoms, and Treatment?

  Chronic knee pain is a long-lasting pain in the knees that is associated with swelling and stiffness. Typically, a knee pain lasts for more than three months. There are several causes of chronic knee pain and this article will focus on its causes, symptoms, diagnosis, and treatment.What is...

• Why Do Some Vaccines Have to Be Injected Twice?

   What is active immunity?...

• What Is Nicotine?

  IntroductionNicotine is an alkaloid stimulant that comes from the nightshade family of plants, particularly from the leaves of tobacco. The type of nicotine found in tobacco plants is called Nicotiana tabacum. Nicotine can also be synthetically produced. Thousands of chemicals are contained in...

• What's a Micropenis?

  A micropenis is a penis that is smaller than an average human penis size. It is smaller than 7 cm or 2.7 inches when erected or smaller than 4 cm or 1.5 inches when flaccid, which is actually two and a half times smaller than the average penis.It affects about 0.6 percent of men, so it is a very...

• What Causes Constipation?

  What is constipation?Constipation is defined as not being able to pass stools in a regular manner, or being unable to fully empty your bowels. Most people experience constipation only for a short period of time. However, it can be a chronic condition to some.Chronic constipation can result in...

• 512 Pill Used for the Treatment of Chronic Pain

  IntroductionThe 512 pill is a white-colored round pill with an imprint of "512". It is known to contain the active ingredients acetaminophen with the strength of 325 mg and oxycodone with the strength of 5 mg. This medicine is supplied by the company known as Mallinckrodt Pharmaceuticals.The 512...